package io;

import java.io.*;

/**
 * 缓冲流:是一对高级流,作用是加快读写效率
 * 1)BufferedInputStream缓冲输入流
 */
public class CopyDemo3Buffered {
    public static void main(String[] args) throws IOException {
        FileInputStream fis = new FileInputStream("gouzi.jpg");
        BufferedInputStream bis = new BufferedInputStream(fis);
        FileOutputStream fos = new FileOutputStream("gouziz_cp011.jpg");
        BufferedOutputStream bos = new BufferedOutputStream(fos);

        int d;
        long start = System.currentTimeMillis();
        while ((d = bis.read())!=-1){
            bos.write(d);
        }
        long end = System.currentTimeMillis();
        System.out.println(end-start);
        bis.close();
        bos.close();
    }
}
